I just installed StackSizeController and configured it to be used by the default group.
When I run /stack, I get the error "Stack size controller has encountered an error while trying to read the data file. Please contact me.. yada yada yada"

It is in the right dir, I have other mods and they work.
I validated with Jsonlint, you can check it yourself. Copy pasted from this file.https://pastebin.com/S6mNvCCX
Any ideas?
When I run /stack, I get the error "Stack size controller has encountered an error while trying to read the data file. Please contact me.. yada yada yada"

It is in the right dir, I have other mods and they work.
I validated with Jsonlint, you can check it yourself. Copy pasted from this file.https://pastebin.com/S6mNvCCX
Any ideas?